. The Journal of laryngology and otology. superior maxilla and inferior turbinate bonesmay be readily made out. The anterior half of the lachrymalgroove formed by the thick ascending process of the upper jaw maybe identified as a prominence—torus lachrymalis—in front of theanterior end of the insertion of the middle turbinate, and is avaluable guide to operation. Ethmoid cells, such as the frontal andanterior ethmoidal, may abut on the median aspect of the lachrymal 172 The Journal of Laryngology, [April, 1914. fossa (Fig. 2/), the thin bony wall which separates the two cavitiesoften showing d
. The Journal of laryngology and otology. superior maxilla and inferior turbinate bonesmay be readily made out. The anterior half of the lachrymalgroove formed by the thick ascending process of the upper jaw maybe identified as a prominence—torus lachrymalis—in front of theanterior end of the insertion of the middle turbinate, and is avaluable guide to operation. Ethmoid cells, such as the frontal andanterior ethmoidal, may abut on the median aspect of the lachrymal 172 The Journal of Laryngology, [April, 1914. fossa (Fig. 2/), the thin bony wall which separates the two cavitiesoften showing dehiscences which readily allow of the passage ofdisease from cells to sac. The infundibulum of the frontal sinuso ccasionally comes so far down as to lie close to the sac, whilst themaxillary antrum has a relation to the tear duct. But it is thecl ose proximity of the ethmoid to the tear sac which explains thefrequency of the connection between lachrymal and nasal addition we have close communication between the venous and. Fig 3 —Dissection showing parts about lachrymal sac and duct (afterKilliin^ a Frontal sinuses, b. Infundibulum of frontal smus. c and cells, e. Naso-lachrymal duct. /. Prelachrymal recess of Antrum, h. Middle turbinate, i. Inferior turbinate, j. Nasal bone. lymph tracts of the two regions. Fig. 3 shows the infundibulumcoming close to the sac and an ethmoidal cell overlapping it. Lachrymal Affectioks and Nasal of the tear passages from nasal causes range fromsimple epiphora to severe phlegmonous dacryocystitis. The nasalconditions producing them may be grouped together mainly underthree heads: April, 1914] Rhinology, and Otology. 173 (1) Those Interfering by Pressure on the Outlet of the —Inthis group, which has long been recognised by rhinologists, are con-ditions which impede either by their size or structure the outflowof tears into the nose. The removal of hvpertrophied turbinates,polypi, c
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Keywords: ., bo, bookcentury1800, booksubjectear, booksubjectnose, bookyear1887
